Peter Qiu | 376e404 | 2014-11-13 09:40:28 -0800 | [diff] [blame] | 1 | // Copyright 2014 The Chromium OS Authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | #include "apmanager/service.h" |
| 6 | |
| 7 | #include <signal.h> |
| 8 | |
Peter Qiu | 376e404 | 2014-11-13 09:40:28 -0800 | [diff] [blame] | 9 | #include <base/strings/stringprintf.h> |
| 10 | #include <chromeos/dbus/service_constants.h> |
| 11 | #include <chromeos/errors/error.h> |
| 12 | |
Peter Qiu | fb39ba4 | 2014-11-21 09:09:59 -0800 | [diff] [blame] | 13 | #include "apmanager/manager.h" |
Peter Qiu | 376e404 | 2014-11-13 09:40:28 -0800 | [diff] [blame] | 14 | |
| 15 | using chromeos::dbus_utils::AsyncEventSequencer; |
| 16 | using chromeos::dbus_utils::ExportedObjectManager; |
Vitaly Buka | a463092 | 2014-12-11 18:46:46 -0800 | [diff] [blame] | 17 | using org::chromium::apmanager::ManagerAdaptor; |
Peter Qiu | 376e404 | 2014-11-13 09:40:28 -0800 | [diff] [blame] | 18 | using std::string; |
| 19 | |
| 20 | namespace apmanager { |
| 21 | |
| 22 | // static. |
Peter Qiu | fb39ba4 | 2014-11-21 09:09:59 -0800 | [diff] [blame] | 23 | const char Service::kHostapdPath[] = "/usr/sbin/hostapd"; |
Peter Qiu | 7751730 | 2015-01-08 16:22:16 -0800 | [diff] [blame] | 24 | const char Service::kHostapdConfigPathFormat[] = |
| 25 | "/var/run/apmanager/hostapd/hostapd-%d.conf"; |
Peter Qiu | 1dbf9fd | 2015-01-09 13:36:55 -0800 | [diff] [blame] | 26 | const char Service::kHostapdControlInterfacePath[] = |
| 27 | "/var/run/apmanager/hostapd/ctrl_iface"; |
Peter Qiu | 376e404 | 2014-11-13 09:40:28 -0800 | [diff] [blame] | 28 | const int Service::kTerminationTimeoutSeconds = 2; |
| 29 | |
Peter Qiu | fb39ba4 | 2014-11-21 09:09:59 -0800 | [diff] [blame] | 30 | Service::Service(Manager* manager, int service_identifier) |
Peter Qiu | 376e404 | 2014-11-13 09:40:28 -0800 | [diff] [blame] | 31 | : org::chromium::apmanager::ServiceAdaptor(this), |
Peter Qiu | fb39ba4 | 2014-11-21 09:09:59 -0800 | [diff] [blame] | 32 | manager_(manager), |
Peter Qiu | 376e404 | 2014-11-13 09:40:28 -0800 | [diff] [blame] | 33 | service_identifier_(service_identifier), |
Vitaly Buka | a463092 | 2014-12-11 18:46:46 -0800 | [diff] [blame] | 34 | service_path_( |
| 35 | base::StringPrintf("%s/services/%d", |
| 36 | ManagerAdaptor::GetObjectPath().value().c_str(), |
| 37 | service_identifier)), |
Peter Qiu | 376e404 | 2014-11-13 09:40:28 -0800 | [diff] [blame] | 38 | dbus_path_(dbus::ObjectPath(service_path_)), |
Peter Qiu | bf8e36c | 2014-12-03 22:59:45 -0800 | [diff] [blame] | 39 | config_(new Config(manager, service_path_)), |
Peter Qiu | 7751730 | 2015-01-08 16:22:16 -0800 | [diff] [blame] | 40 | dhcp_server_factory_(DHCPServerFactory::GetInstance()), |
Peter Qiu | 1dbf9fd | 2015-01-09 13:36:55 -0800 | [diff] [blame] | 41 | file_writer_(FileWriter::GetInstance()), |
| 42 | process_factory_(ProcessFactory::GetInstance()) { |
Peter Qiu | 376e404 | 2014-11-13 09:40:28 -0800 | [diff] [blame] | 43 | SetConfig(config_->dbus_path()); |
Peter Qiu | bf8e36c | 2014-12-03 22:59:45 -0800 | [diff] [blame] | 44 | // TODO(zqiu): come up with better server address management. This is good |
| 45 | // enough for now. |
| 46 | config_->SetServerAddressIndex(service_identifier_ & 0xFF); |
Peter Qiu | 376e404 | 2014-11-13 09:40:28 -0800 | [diff] [blame] | 47 | } |
| 48 | |
| 49 | Service::~Service() { |
| 50 | // Stop hostapd process if still running. |
| 51 | if (IsHostapdRunning()) { |
Peter Qiu | bf8e36c | 2014-12-03 22:59:45 -0800 | [diff] [blame] | 52 | ReleaseResources(); |
Peter Qiu | 376e404 | 2014-11-13 09:40:28 -0800 | [diff] [blame] | 53 | } |
| 54 | } |
| 55 | |
| 56 | void Service::RegisterAsync(ExportedObjectManager* object_manager, |
Peter Qiu | c9ce1f1 | 2014-12-05 11:14:29 -0800 | [diff] [blame] | 57 | const scoped_refptr<dbus::Bus>& bus, |
Peter Qiu | 376e404 | 2014-11-13 09:40:28 -0800 | [diff] [blame] | 58 | AsyncEventSequencer* sequencer) { |
| 59 | CHECK(!dbus_object_) << "Already registered"; |
| 60 | dbus_object_.reset( |
| 61 | new chromeos::dbus_utils::DBusObject( |
| 62 | object_manager, |
Peter Qiu | c9ce1f1 | 2014-12-05 11:14:29 -0800 | [diff] [blame] | 63 | bus, |
Peter Qiu | 376e404 | 2014-11-13 09:40:28 -0800 | [diff] [blame] | 64 | dbus_path_)); |
| 65 | RegisterWithDBusObject(dbus_object_.get()); |
| 66 | dbus_object_->RegisterAsync( |
| 67 | sequencer->GetHandler("Service.RegisterAsync() failed.", true)); |
| 68 | |
| 69 | // Register Config DBus object. |
Peter Qiu | c9ce1f1 | 2014-12-05 11:14:29 -0800 | [diff] [blame] | 70 | config_->RegisterAsync(object_manager, bus, sequencer); |
Peter Qiu | 376e404 | 2014-11-13 09:40:28 -0800 | [diff] [blame] | 71 | } |
| 72 | |
| 73 | bool Service::Start(chromeos::ErrorPtr* error) { |
| 74 | if (IsHostapdRunning()) { |
| 75 | chromeos::Error::AddTo( |
| 76 | error, FROM_HERE, chromeos::errors::dbus::kDomain, kServiceError, |
| 77 | "Service already running"); |
| 78 | return false; |
| 79 | } |
| 80 | |
Peter Qiu | bfd410e | 2015-01-09 15:14:20 -0800 | [diff] [blame] | 81 | // Setup hostapd control interface path. |
| 82 | config_->set_control_interface(kHostapdControlInterfacePath); |
| 83 | |
Peter Qiu | 376e404 | 2014-11-13 09:40:28 -0800 | [diff] [blame] | 84 | // Generate hostapd configuration content. |
| 85 | string config_str; |
| 86 | if (!config_->GenerateConfigFile(error, &config_str)) { |
| 87 | chromeos::Error::AddTo( |
| 88 | error, FROM_HERE, chromeos::errors::dbus::kDomain, kServiceError, |
| 89 | "Failed to generate config file"); |
| 90 | return false; |
| 91 | } |
| 92 | |
| 93 | // Write configuration to a file. |
Peter Qiu | 7751730 | 2015-01-08 16:22:16 -0800 | [diff] [blame] | 94 | string config_file_name = base::StringPrintf(kHostapdConfigPathFormat, |
| 95 | service_identifier_); |
| 96 | if (!file_writer_->Write(config_file_name, config_str)) { |
Peter Qiu | 376e404 | 2014-11-13 09:40:28 -0800 | [diff] [blame] | 97 | chromeos::Error::AddTo( |
| 98 | error, FROM_HERE, chromeos::errors::dbus::kDomain, kServiceError, |
| 99 | "Failed to write configuration to a file"); |
| 100 | return false; |
| 101 | } |
| 102 | |
Peter Qiu | fb39ba4 | 2014-11-21 09:09:59 -0800 | [diff] [blame] | 103 | // Claim the device needed for this ap service. |
| 104 | if (!config_->ClaimDevice()) { |
| 105 | chromeos::Error::AddTo( |
| 106 | error, FROM_HERE, chromeos::errors::dbus::kDomain, kServiceError, |
| 107 | "Failed to claim the device for this service"); |
| 108 | return false; |
| 109 | } |
| 110 | |
Peter Qiu | 376e404 | 2014-11-13 09:40:28 -0800 | [diff] [blame] | 111 | // Start hostapd process. |
Peter Qiu | 7751730 | 2015-01-08 16:22:16 -0800 | [diff] [blame] | 112 | if (!StartHostapdProcess(config_file_name)) { |
Peter Qiu | 376e404 | 2014-11-13 09:40:28 -0800 | [diff] [blame] | 113 | chromeos::Error::AddTo( |
| 114 | error, FROM_HERE, chromeos::errors::dbus::kDomain, kServiceError, |
| 115 | "Failed to start hostapd"); |
Peter Qiu | fb39ba4 | 2014-11-21 09:09:59 -0800 | [diff] [blame] | 116 | // Release the device claimed for this service. |
| 117 | config_->ReleaseDevice(); |
Peter Qiu | 376e404 | 2014-11-13 09:40:28 -0800 | [diff] [blame] | 118 | return false; |
| 119 | } |
| 120 | |
Peter Qiu | bf8e36c | 2014-12-03 22:59:45 -0800 | [diff] [blame] | 121 | // Start DHCP server if in server mode. |
| 122 | if (config_->GetOperationMode() == kOperationModeServer) { |
| 123 | dhcp_server_.reset( |
| 124 | dhcp_server_factory_->CreateDHCPServer(config_->GetServerAddressIndex(), |
| 125 | config_->selected_interface())); |
| 126 | if (!dhcp_server_->Start()) { |
| 127 | chromeos::Error::AddTo( |
| 128 | error, FROM_HERE, chromeos::errors::dbus::kDomain, kServiceError, |
| 129 | "Failed to start DHCP server"); |
| 130 | ReleaseResources(); |
| 131 | return false; |
| 132 | } |
| 133 | } |
| 134 | |
Peter Qiu | fda548c | 2015-01-13 14:39:19 -0800 | [diff] [blame^] | 135 | // Start monitoring hostapd. |
| 136 | if (!hostapd_monitor_) { |
| 137 | hostapd_monitor_.reset( |
| 138 | new HostapdMonitor(base::Bind(&Service::HostapdEventCallback, |
| 139 | base::Unretained(this)), |
| 140 | config_->control_interface(), |
| 141 | config_->selected_interface())); |
| 142 | } |
| 143 | hostapd_monitor_->Start(); |
| 144 | |
Peter Qiu | 376e404 | 2014-11-13 09:40:28 -0800 | [diff] [blame] | 145 | return true; |
| 146 | } |
| 147 | |
| 148 | bool Service::Stop(chromeos::ErrorPtr* error) { |
| 149 | if (!IsHostapdRunning()) { |
| 150 | chromeos::Error::AddTo( |
| 151 | error, FROM_HERE, chromeos::errors::dbus::kDomain, kServiceError, |
| 152 | "Service is not currently running"); |
| 153 | return false; |
| 154 | } |
| 155 | |
Peter Qiu | bf8e36c | 2014-12-03 22:59:45 -0800 | [diff] [blame] | 156 | ReleaseResources(); |
Peter Qiu | 376e404 | 2014-11-13 09:40:28 -0800 | [diff] [blame] | 157 | return true; |
| 158 | } |
| 159 | |
| 160 | bool Service::IsHostapdRunning() { |
| 161 | return hostapd_process_ && hostapd_process_->pid() != 0 && |
| 162 | chromeos::Process::ProcessExists(hostapd_process_->pid()); |
| 163 | } |
| 164 | |
| 165 | bool Service::StartHostapdProcess(const string& config_file_path) { |
Peter Qiu | 1dbf9fd | 2015-01-09 13:36:55 -0800 | [diff] [blame] | 166 | hostapd_process_.reset(process_factory_->CreateProcess()); |
Peter Qiu | fb39ba4 | 2014-11-21 09:09:59 -0800 | [diff] [blame] | 167 | hostapd_process_->AddArg(kHostapdPath); |
Peter Qiu | 376e404 | 2014-11-13 09:40:28 -0800 | [diff] [blame] | 168 | hostapd_process_->AddArg(config_file_path); |
| 169 | if (!hostapd_process_->Start()) { |
| 170 | hostapd_process_.reset(); |
| 171 | return false; |
| 172 | } |
| 173 | return true; |
| 174 | } |
| 175 | |
| 176 | void Service::StopHostapdProcess() { |
| 177 | if (!hostapd_process_->Kill(SIGTERM, kTerminationTimeoutSeconds)) { |
| 178 | hostapd_process_->Kill(SIGKILL, kTerminationTimeoutSeconds); |
| 179 | } |
| 180 | hostapd_process_.reset(); |
| 181 | } |
| 182 | |
Peter Qiu | bf8e36c | 2014-12-03 22:59:45 -0800 | [diff] [blame] | 183 | void Service::ReleaseResources() { |
| 184 | StopHostapdProcess(); |
| 185 | dhcp_server_.reset(); |
| 186 | config_->ReleaseDevice(); |
| 187 | } |
| 188 | |
Peter Qiu | fda548c | 2015-01-13 14:39:19 -0800 | [diff] [blame^] | 189 | void Service::HostapdEventCallback(HostapdMonitor::Event event, |
| 190 | const std::string& data) { |
| 191 | switch (event) { |
| 192 | case HostapdMonitor::kStationConnected: |
| 193 | LOG(INFO) << "Station connected: " << data; |
| 194 | break; |
| 195 | case HostapdMonitor::kStationDisconnected: |
| 196 | LOG(INFO) << "Station disconnected: " << data; |
| 197 | break; |
| 198 | default: |
| 199 | LOG(ERROR) << "Unknown event: " << event; |
| 200 | break; |
| 201 | } |
| 202 | } |
| 203 | |
Peter Qiu | 376e404 | 2014-11-13 09:40:28 -0800 | [diff] [blame] | 204 | } // namespace apmanager |